Base64 Encode / Decode
Free
Encode plain text to Base64 or decode Base64 strings back to text. Supports standard and URL-safe encoding. Commonly used for auth headers and binary data inspection.
#base64#encoding#auth#api-testing
Plain Text
0 chars
Base64 Output
0 chars
Common Use Cases in Testing
Basic Auth Header
Encode username:password for Authorization: Basic headers
API Response Payloads
Some APIs return base64-encoded data fields
JWT Segments
JWT header and payload are base64url-encoded